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Total 122 documents matching your query.

61. Re: [Amps] Boycott New Chinese linear Amplifier (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Sun, 1 Oct 2006 03:13:38 +0800
Hi, I do not want to deny it is the ''copy" of AL811, especially in cabinnet and posion of the parts. But not all.One of builders is my friend,so I know something about it.The amplifier what they bui
/archives//html/Amps/2006-09/msg00383.html (13,053 bytes)

62. Re: [Amps] Boycott New Chinese linear Amplifier (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Sun, 1 Oct 2006 16:39:47 +0800
Craft. you can see the diffrence between the amp and AL-811.I do not know why some american amp's so bad craft. myebe due to the cost.Many old American and Japese amps is very good, I have seen Colli
/archives//html/Amps/2006-10/msg00001.html (8,038 bytes)

63. [Amps] HP436A power meter help needed (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Mon, 2 Oct 2006 01:57:08 +0800
Hi, Guys, I just purchased an HP436A+8481B sensor, but the sensor without 30db attenuator, one of my friend told me that 8481B must use with attenuator together, the attenuator supply bias for 8481B
/archives//html/Amps/2006-10/msg00003.html (6,596 bytes)

64. Re: [Amps] Boycott New Chinese linear Amplifier (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Wed, 4 Oct 2006 08:06:07 +0800
Tom, It seems you do not know some Chinese tube's history. 811 was called FU-811 in China . it is copy from Russian G-811, 813 was called FU-13, it is copy from Russian GU-13. Chinese 811 and 813 hav
/archives//html/Amps/2006-10/msg00007.html (11,103 bytes)

65. Re: [Amps] Boycott New Chinese linear Amplifier (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Wed, 4 Oct 2006 10:50:14 +0800
Tom, Maybe you are right.These tube factory are "pure" state factory, without any foreign capital back grund. Its rigescent system kill any person's appetency of innovation. But not all.for example ,
/archives//html/Amps/2006-10/msg00009.html (9,308 bytes)

66. Re: [Amps] Boycott New Chinese linear Amplifier (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Thu, 5 Oct 2006 06:16:16 +0800
I just oppress the impulsion of name-calling. Thank God, it seems it is a misapprehension. As a gentleman, I seldom use indelicate word, but it not means I can not say that words 73! Hsu -- Original
/archives//html/Amps/2006-10/msg00027.html (10,418 bytes)

67. [Amps] Power meter and Amplifier board FS (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Fri, 13 Oct 2006 15:28:26 +0800
Hi, I just got an HP436A with 8481B( I have got the matching attenuator just now) senson I hve an HP435A +8482A, so I need sell one. HP435A+8481B+ 30db attenuator,$650 ,you pay the shipping cost( dep
/archives//html/Amps/2006-10/msg00107.html (6,914 bytes)

68. Re: [Amps] Best Source for 8877? (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Mon, 16 Oct 2006 09:52:58 +0800
Jim, I think "imported" 8877 was made in China. Hsu -- Original Message -- From: "jhsimon" <jhsimon@comcast.net> To: <amps@contesting.com> Sent: Monday, October 16, 2006 7:26 AM Subject: [Amps] Best
/archives//html/Amps/2006-10/msg00154.html (7,779 bytes)

69. [Amps] 8874 /3CX400A7 (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Sun, 22 Oct 2006 05:37:03 +0800
Hi, My friend need a pair 8874/3CX400A7.Anyone have a pair of 8874/3CX400A7 pulls at a reasonable price? 73! Hsu _______________________________________________ Amps mailing list Amps@contesting.com
/archives//html/Amps/2006-10/msg00230.html (6,524 bytes)

70. Re: [Amps] More information for "What NOT to buy".. (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Tue, 24 Oct 2006 13:05:13 +0800
Could someone can tell me how much money for a pair NOS 4-400? 73! Hsu _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listin
/archives//html/Amps/2006-10/msg00262.html (8,880 bytes)

71. [Amps] Variable capacitors and 4CX250B FS (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Tue, 14 Nov 2006 16:04:31 +0800
I have 20 NOS Variable capacitors, one is 1400PF/1kV(0.65mm spacing ), another one is 200PF/3kV(2mm spacing ). a set of capacitors(1400P/1kV+200P/3.5kV)=$80, include shipping.WxHxD=92mmx87mmx85mm( in
/archives//html/Amps/2006-11/msg00161.html (7,260 bytes)

72. Re: [Amps] Variable capacitors and 4CX250B FS (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Tue, 14 Nov 2006 16:14:31 +0800
Sorry, make incorrect, WxHxD not include shaft's length. -- Original Message -- From: "Hsu" <Jbenson@sohu.com> To: <ham_amplifiers@yahoogroups.com> Cc: <amps@contesting.com> Sent: Tuesday, November 1
/archives//html/Amps/2006-11/msg00162.html (7,511 bytes)

73. [Amps] NOS TV transmiting tube FS (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Sat, 18 Nov 2006 07:08:13 +0800
HiI have some NOS TV transmiting tubes FS, FU-720F( Same as 7F71RA),tetrode, Palate dissipation: 3500W filament:4V/78A I ask $500/ea. I can pay the shipping cost(surface mail). JPG and detail specs o
/archives//html/Amps/2006-11/msg00228.html (6,960 bytes)

74. Re: [Amps] TL922-one tube dead? (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Sun, 10 Dec 2006 16:22:43 +0800
Hi, I have 3-500C, $135/ea(less than 10 piecs), over 10 piecs, $ 125/ea. The 3-500C is same as RF parts's 3-500Z, same factory's products,raphite anode.the shipping cost is only depend on the shippin
/archives//html/Amps/2006-12/msg00055.html (8,726 bytes)

75. Re: [Amps] Elecraft amplifiers (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Sat, 16 Dec 2006 08:00:15 +0800
Hi, Toyko-Hypower's inexpensive 1kW amplifier, no morthan $3000. http://www.thp.co.jp/thp%20hp%20Eng/amateur_eng/hf_eng.htm#1.5kfx it useing 4xSD2933 MOS FET.Not 8 piecs MOS FET like elecraft and YAE
/archives//html/Amps/2006-12/msg00098.html (9,844 bytes)

76. Re: [Amps] 2 x 4-250A Amp (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Mon, 18 Dec 2006 09:38:16 +0800
Hi, I just rebuilt a junk TL922, I use a pair Chinese FU500F( same as 4x500A) replace the 3-500Z( worked in GG service) , all grids are grounded I replace the origional fan with a noisy AADA fan , bu
/archives//html/Amps/2006-12/msg00123.html (7,383 bytes)

77. Re: [Amps] 2 x 4-250A Amp (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Mon, 18 Dec 2006 14:35:31 +0800
Sorry, Peter, It is QB3.5/750, not TB3.5/750,I make a mistake.Its datasheet was here: http://www.g8wrb.org/data/Philips/QB3.5-750.pdf.. TL922's output power is 1kW, I think in this level the anode di
/archives//html/Amps/2006-12/msg00128.html (7,521 bytes)

78. Re: [Amps] HV Disc caps needed (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Wed, 20 Dec 2006 06:32:53 +0800
Hi, Like this inexpensive small HV dis caps, Can it replace the high current /volt door knobe caps in tube amplifie?Certainly, they must be in parallel.I have tested them in a 3xFU50(same as Russian
/archives//html/Amps/2006-12/msg00177.html (8,883 bytes)

79. Re: [Amps] QST, and class AB/F MOSFET amps (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Tue, 26 Dec 2006 06:54:30 +0800
Manfred, I'm very interesting in it. Maybe you can make some small power amplifier model and combine them together as a big power amplifier. I built an 25W (2xIRF511) amplifier in 2003, it works fine
/archives//html/Amps/2006-12/msg00215.html (9,002 bytes)

80. [Amps] AL572 help needed (score: 1)
Author: "Hsu" <Jbenson@sohu.com>
Date: Thu, 4 Jan 2007 11:57:58 +0800
Hello everyone! My friend pick up a repairable AL572X.The Pi network's three coils(L1, L2 & L3) have been missed, Could any gus can tell he the detail( diameter ,length and tap,etc ) about the coils?
/archives//html/Amps/2007-01/msg00051.html (6,880 bytes)

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